creia wrote:Merkava_4 wrote:creia wrote:UPDATE: The bore ended up having only .0005-.001 wear.
With such low wear, I'd install a standard size chrome ring kit. I've had huge success with chrome ring kits. No honing needed with chrome ring kits. They bite their own way into the cylinder bore. The chrome ring kit for model 81200 is part# 297201.
The chrome ring kit has eight piston rings and they are arranged like this:
Ringland 1
- Thick Ring By Itself
Ringland 2
- Medium Thick Ring + Narrow Expander Ring*
- Thin Ring
Oh- I am WELL aware of the chrome ring sets. I used them MANY times over the years on both the Briggs 3 HP and 5 HP engines. In this particular case, with only .0005"-.001" bore wear I did not think that was enough to justify/warrant their use. I THOUGHT I could just put the original rings back in (also very minimal wear based on the ring gap I measured). I know better now...
Michael
Ringland 3
- Thin Ring
- Oil Ring + Wide Expander Ring*
- Thin Ring
*The expander ring goes on first and then the solid ring goes over the outside of the expander ring.
All ring gaps are placed 120 degrees in rotation away from each other.
I am WELL aware of the chrome rings, as I have used them MANY times over the years in both the Briggs 3HP and 5Hp engines. My reasoning for not using them this time was with such little bore wear (.0005" - .001") I did not think they would be needed or offer any benefit. I THOUGHT that I could just reinstall the original rings that also had very little wear (as determined by the ring gap). That is why I was very surprised when the engine initially smoked after putting it back together. Brian educated me otherwise....
Michael